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NSI-189
Best NSI-189 Vendors of 2026
Ranked by Price, Purity, and Reputation
1 vendor comparedfrom $0.02/mgCOA-verified sources only
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Quick Comparison
1Swiss ChemsShips WorldwideCOA
10/10$2.00/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Swiss ChemsShips Worldwide | Yes | 10/10 |
Bulk Pricing
Per-vendor quantity breaks — pick a vial size to see the bulk price. Must purchase the full pack.
Swiss ChemsCOA10% code THEPEPTIDECATALOG
as low as $1.35/mg$2399.40$1619.60Save 32%20mg × 60
$2.00/mg $1.35/mg · 25% pack discount + 10% with code
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How We Score Vendors
Our scoring is based on three weighted factors:
Price Competitiveness (40%)
Normalized to cost per milligram for fair comparisons across vial sizes.
COA Availability (30%)
Third-party lab testing confirming purity, identity, and absence of contaminants.
Vendor Reputation (30%)
Community feedback, shipping reliability, customer service, and business track record.